CIMB4 on Nostr: noob question: isn't a backup just a copy of your files somewhere else? what happens ...

noob question: isn't a backup just a copy of your files somewhere else? what happens when you purposefully delete a file? does it get deleted on the backup too? what if you delete a file accidentally?

or are backups strictly for hardware failure, not for human error?

(i am doing manual backups (a little less regularily than i'd like) and have to use a tool to review all changes between my current files and the prev. backup to be sure because i don't understand automatic backups) :c